pseries: Add H_SET_MODE to change exception endianness
On little endian builds call H_SET_MODE so exceptions have the
correct endianness. We need to reset the endian during kexec
so do that in the MMU hashtable clear callback.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index 356bc75..4fca3de 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -245,6 +245,23 @@
&(ptes[j].pteh), &(ptes[j].ptel));
}
}
+
+#ifdef __LITTLE_ENDIAN__
+ /* Reset exceptions to big endian */
+ if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
+ long rc;
+
+ rc = pseries_big_endian_exceptions();
+ /*
+ * At this point it is unlikely panic() will get anything
+ * out to the user, but at least this will stop us from
+ * continuing on further and creating an even more
+ * difficult to debug situation.
+ */
+ if (rc)
+ panic("Could not enable big endian exceptions");
+ }
+#endif
}
/*